District



(M'del.)

(fw. P. PHILLIPS.

- Telegraph-Key.'

No. 228,111. Patented May 25,1880.V

WITNESSES d'wm! v Y ATTORNEY NAFETERS. PHDTO-LITHOGRAFHER, WASHINGTON.C.

UNITED STATES PATENT OFFICE.

WALTER P. PHILLIPS, OF WASHINGTON, DISTRIGTIOF COLUMBIA.

TELEGRAPH-KEY.

SPECIFICATION forming part of Letters Patent No. 228,111, dated May 25,1880.4 Application filed March 25, 1880. (Model.)

l use the same, reference being had to the accompanying drawings, and toletters or figures of reference marked thereon, which form a part ofthis specification.

My invent-ion relates to telegraph-instruments; and it consists of a keywith a removable lower contact-point or anvil for breaking and closingelectrical circuits by means of a lever having` a point of steel orother metal,

which is brought in contact, by means of aV linger-knob, with theremovable anvil or baseplate.

Figure 1 of the drawings submitted herewith gives a perspective view ofthe complete key. Fig. 2 gives a view of a vertical section of the basein which the removable anvil is inserted. Fig.- 3 gives a perspectiveview of the removable anvil.

The key is made in two parts, A and C, connected at the back by ajoint,B, and has a screw for the purpose of adjusting its up-and-downmovement and a spiral spring, I, for the purpose of exerting a pressureagainst connecting the contact-points, thus making such connection, whenmade, irm and thorough. One of the points, G, is a steel screw Without ahead screwed fast in the top lever, A. The other is a removable pivot oranvil, H, fitting into a receptacle in a nut, F, driven into thebaseplate C.' The latter is fastened to the head of the connectingtable-screw J and is embedded in a non-conducting substance.

The circuit-closer D consists of a plate-arm which has a small knob atone endl, the other being fastened to the base-plate G by a screwbetween the joint and the contact-points.

The object of this invention is to secure ease and accuracy intransmission, by guarding against the oxidation of the contact-points.

My aim is to prevent the burning of the contact-points by making themeasy of removal for the purpose of cleaning them, and by making theupper one small and the lower one large, so as to bring the electricsparks out on the bottom point, H, thus protecting the upper one, Gr,almost Wholly.

The bottom point being easily displaced can be readily cleaned, and thusthe key is kept in perfect Working order.

I claimy 1. In combination with a telegraph-key, a removable anvil, ofiron, platinum, or other metal, substantially as described.

2. In combination with the removable anvil, the socket-receptacle forholding the anvil.

In testimony whereof I affix my signature in presence of two witnesses.

WALTER P. PHILLIPS.

Witnesses J AMES H. KING, A. I. MUDI).

